package com.egreen.pointsmall.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

public class UserFilter implements Filter {

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request= (HttpServletRequest) servletRequest;
        HttpServletResponse response= (HttpServletResponse) servletResponse;
        HttpSession session = request.getSession();
        if (session.getAttribute("user")==null){
            //表示当前未登录
            response.sendRedirect("/login");
        }else{
            filterChain.doFilter(servletRequest, servletResponse);
        }
    }
}
